Rock-bit breaker



Sept. 27,192]. 1,643,442

H. BRALJER ET AL ROCK BIT BREAKER Filed Feb. 6. 1926 J epmazz fimaen Patented Sept. 27, 1927. v v l UNITED-STATES PATENT o ca Application filed February 6, 1926. Serial No. 86,647.

This invention relates to rock bit break and configuration to be snugly received ers and it is an object of the invention to within the square or opening 1. Disposed provide a device of this kind adapted for through the breaker B at the central poruse in connection with the table of a rotary tion thereof is an opening 2 of a form to 5 drilling rig to tighten up or unscrew the permit the insertion therethrough of a rock bit. bit R- and whereby the bit R is held against A th bj t f th i ti i t rotation independently of the breaker B. vide a device of this kind adapted to be e ends of the opening 2 are arcuate in engaged within the square of the rotary f rrn o properly receive the drill bit. The

ll) table and which is provided with means upp r S rface of the breaker B has hingedly whereby the device may be readily and conconnected therewith at 3 the extremities Of eniently applied or re nqved with respect (1 ball 4 whereby the breaker lllaiy be readily to the table applied to orremoved from working p0- The invention consists in the details of 1 11 Wi h respect to the table T or other-- construction and in the combination and Wise handled as the ccasions of practice arrangement of the several parts of our imy Il a c- 7 proved rock bit breaker whereby certain W hen .1t 1s desired to either remove or important advantages are attained and the tighten p the bit R with respect to its device rendered simpler, less expensive and 0011M G, h bl R is positioned or received 20 otherwise no 'e convenient and advan- With the breaker B and the table T caused tageous for use, as will be hereinafter more to r a e in desired direction. During the fully set forth. rotation of the table T, a conventional The novel features of our invention will Wrench D g g d With the collar C so h r i ft b d fi it l claimed 7 that the desired relative rotation of the bit 25 In rder that our invention n1ay be the R With respect t0 the COllLI C may be readily better understood, e will now proceed to effected \Vhlle the table T is in IOtiltlOIl.

describe the same with reference to the acrom the foregoing description it is companying drawing, wherein thought to be obvious that a rock bit breaker Figure 1 is a view in perspective illusconstructed in accordance with our invention 30 trating a breaker constructed in accordance is par icularly well adapted for use by reawith an embodiment of our'invention posison of the convenience and facility with tioned to be received within the squar of which it may be assembled and operated, and the table of a rotary drilling rig; I p it will also be obvious that our invention is Figure 2 is a view in elevation illustrating susceptible of some change and modification 35 the device in applied position, the table without departing from the principles and being indicated by broken lines and a holdspirit thereof and for this reason we do not ing wrench being engaged with the drill wish to be understood as limiting ourselves collar; to the precise arrangement and formation Fi 3 i a i i t l f th of the several parts herein shown in carrybreaker as herein disclosed, an applied bit lng out our invention in practice except as being indicated by broken lines; hereinafter claimed.

Figure 4 is a view in side elevation of the We claim device as illustrated in Figur 3. In a rock bit breaker abushing consisting As illustrated in the accompanying drawof a body which is square in plan and pro- 45 ing, T denotes the table of a rotary drilling vided at its center with an elongated openrig of any desired or preferred type and ing, the end walls of which are arcuately which is provided at its axial center with curved and the side walls of which are the square or opening 1. parallel, a bail member pivoted at its ends Our improved breaker B is formed of any upon the face of the body at points upon a-- desired material and is of such dimensions line disposed transversely across said opening and at a point midway between the ends by the bail may be swung toward eitherjend of the opening and its intermediate portion will lie within the sides of the body and beyond the adjacent curved end of the open- 10 ing.

In testimony whereof we hereunto afiix our signatures.

.L N BOE-1 HERMAN BRAUER. 

